ND-21-0625, ITAAC Closure Notification on Completion of 2.1.02.12a.iii (Index Number 55)

ITAAC Closure Notification on Completion of 2.1.02.12a.iii (Index Number 55)

ML21202A320
Person / Time
Site:	Vogtle
Issue date:	07/21/2021
From:	Yox M Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ND-21-0625
Download: ML21202A320 (7)

Text

Michael J. Yox 7825 River Road Southern Nuclear Regulatory Affairs Director Waynesboro, GA 30830 Vogtle 3 & 4 706-848-6459 tel Docket No.: 52-025 ND-21-0625 JUL 2 1 2021 10 CFR 52.99(c)(1)

U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001 Southern Nuclear Operating Company Vogtle Electric Generating Plant Unit 3 ITAAC Closure Notification on Completion of 2.1.02.12a.iii [Index Number 551 Ladies and Gentlemen:

In accordance with 10 CFR 52.99(c)(1), the purpose of this letter is to notify the Nuclear Regulatory Commission (NRC) of the completion of Vogtle Electric Generating Plant(VEGP) Unit 3 Inspections, Tests, Analyses, and Acceptance Criteria ITAAC item 2.1.02.12a.iii [Index Number 55]

for verifying the automatic depressurization valves identified in Table 2.1.2-1 perform an active safety-related function to change position as indicated in the table. The closure process for this ITAAC is based on the guidance described in NEI 08-01, "Industry Guideline for the ITAAC Closure Process under 10 CFR Part 52," which was endorsed by the NRC in Regulatory Guide 1.215.

This letter contains no new NRC regulatory commitments. Southern Nuclear Operating Company (SNC) requests NRC staff confirmation of this determination and publication of the required notice in the Federal Register per 10 CFR 52.99.

If there are any questions, please contact Kelli Roberts at 706-848-6991.

Respectfully submitted.

-fir M Michael J. Yox Regulatory Affairs Director Vogtle 3 & 4

Enclosure:

Vogtle Electric Generating Plant(VEGP) Unit 3 Completion of ITAAC 2.1.02.12a.iii [Index Number 55]

MJY/DLW/sfr

U.S. Nuclear Regulatory Commission ND-21-0625 Page 2 of 3 To:

Southern Nuclear Operating Company/ Georgia Power Company Mr. Peter P. Sena III Mr. D. L. McKinney Mr. M. D. Meier Mr. G. Chick Mr. S. Stimac Mr. P. Martino Mr. M. J. Yox Mr. A. S. Parton Ms. K. A. Roberts Mr. C. T. Defnall Mr. C. E. Morrow Mr. J. M. Fisher Mr. R. L. Beiike Mr. S. Leighty Ms. A. C. Chamberiain Mr. J. C. Hasweii Document Services RTYPE; VND.LI.L06 Fiie AR.01.02.06 cc; Nuclear Reouiatorv Commission Ms. M. Bailey Mr. M. King Mr. G. Bowman Ms. A. Veii M C. P. Patel M . G. J. Khouri M . C. J. Even M B. J. Kemker Ms. N. C. Coovert M . C. Welch M . J. Gaslevic M . O. Lopez-Santiago M G. Armstrong M M. Webb M T. Fredette M C. Santos M B. Davis M J. Vasquez M J. Eargie M E. Davidson M T. Faneiii Ms. K. McCurry M J. Parent M B. Griman

U.S. Nuclear Regulatory Commission ND-21-0625 Page 3 of 3 Qqlethorpe Power Corporation Mr. R. B. Brinkman Mr. E. Rasmussen Municipal Electric Authority of Georgia Mr. J. E. Fuller Mr. 8. M. Jackson Dalton Utilities Mr. T. Bundros Westinqhouse Electric Company. LLC Dr. L. Oriani Mr. D. C. Durham Mr. M. M. Corletti Mr. Z. 8. Harper Mr. J. L. Coward Other Mr. 8. W. Kline, Bechtel Power Corporation Ms. L. Matis, Tetra Tech NU8, Inc.

Dr. W. R. Jacobs, Jr., Ph.D., GD8 Associates, Inc.

Mr. 8. Roetger, Georgia Public Service Commission Mr. R. L. Trokey, Georgia Public Service Commission Mr. K. C. Greene, Troutman Sanders Mr. 8. Blanton, Balch Bingham

U.S. Nuclear Regulatory Commission ND-21-0625 Enclosure Page 1 of 4 Southern Nuclear Operating Company ND-21-0625 Enclosure Vogtle Electric Generating Plant(VEGP) Unit 3 Completion of ITAAC 2.1.02.12a.lii [Index Number 55]

U.S. Nuclear Regulatory Commission ND-21-0625 Enclosure Page 2 of 4 ITAAC Statement Design Commitment 12.a) The automatic depressurization valves identified in Table 2.1.2-1 perform an active safety-related function to change position as indicated in the table.

Inspections/Tests/Analvses ill) Tests of the motor-operated valves will be performed under pre-operational flow, differential pressure and temperature conditions.

Acceptance Criteria iii) Each motor-operated valve changes position as indicated in Table 2.1.2-1 under pre-operational test conditions.

ITAAC Determination Basis Multiple ITAAC are performed to verify that the Automatic Depressurization System (ADS) valves identified in Table 2.1.2-1 perform an active safety-related function to change position as indicated in the table. This ITAAC verified each motor-operated valve(MOV)changed position as indicated in Table 2.1.2-1 under preoperational test conditions. These valves were also tested or type tested under design conditions and a report exists that concludes that each motor-operated valve changes position as indicated in Table 2.1.2-1 under design conditions, as required by ITAAC 2.1.02.12a.i(NRC Index No. 53)(Reference 4).

Testing was performed in accordance with Unit 3 preoperational test procedure 3-PXS-ITPP-505(Reference 1) using work order 1071720(Reference 2) to verify that each motor-operated valve changed position as indicated in Attachment A under preoperational test conditions.

Testing was performed sequentially on each ADS stage which has an A and B train and each MOV was operated using the Component Interface Module (CIM). The valves were tested one stage at a time and the tested valves were initially verified locally and in the Main Control Room (MCR)to be in the Closed position. Starting with the first train of the first stage of ADS, testing was performed on the MOVs with the pressurizer at 2235 psig +/-30 psig. Each ADS first stage isolation MOV was opened pressurizing the downstream line and verified to Open. Each ADS first stage MOV was then closed and the corresponding downstream ADS first stage MOV (control valve) was opened under pressure and verified to Open. This same test was repeated for each train of the second and third stage ADS MOVs with the pressurizer at 1200 psig +/-30 psig and 500 psig +/-30 psig, respectively. Note, the fourth-stage ADS MOVs are normally open and do not have an active function to transfer closed.

The completed Unit 3 test results (Reference 1 and 2) verify that each motor-operated valve changed position as indicated in Table 2.1.2-1 under preoperational test conditions and was documented in SV3-PXS-ITR-800055 (Reference 3).

References 1 through 3 are available for NRC inspection as part of the ITAAC Completion Packages (Reference 5).

U.S. Nuclear Regulatory Commission ND-21-0625 Enclosure Page 3 of 4 ITAAC Finding Review In accordance with plant procedures for ITAAC completion, Southern Nuclear Operating Company(SNC) performed a review of all ITAAC findings pertaining to the subject ITAAC and associated corrective actions. This review found there are no relevant ITAAC findings associated with this ITAAC. The ITAAC completion review is documented in the ITAAC Completion Package for ITAAC 2.1.02.12a.iii (Reference 5) and is available for NRC review.

ITAAC Completion Statement Based on the above information, SNC hereby notifies the NRC that ITAAC 2.1.02.12a.iii was performed for VEGP Unit 3 and that the prescribed acceptance criteria were met.

Systems, structures, and components verified as part of this ITAAC are being maintained in their as-designed, ITAAC compliant condition in accordance with approved plant programs and procedures.

References favallable for NRC inspection)

1. 3-PXS-ITPP-505 Rev. 1.1,"ADS Stages 1 -3 MOV Dynamic Tesf

2. Work Order 1071720,"(ITAAC) Perform Pre-Operational Test 3-PXS-ITPP-505"

3. SV3-PXS-ITR-800055, Rev 1,"Unit 3 Recorded Results of ADS Stages 1-3 MOV Dynamic Test: ITAAC 2.1.02.12a.iii"

4. ND-20-0994, ITAAC Closure Notification on Completion of ITAAC 2.1.02.12a.i (Index Number 53), dated September 28, 2020(ADAMS accession number ML20272A193)

5. 2.1.02.12a.iii-U3-CP-Rev0, ITAAC Completion Package

U.S. Nuclear Regulatory Commission ND-21-0625 Enclosure Page 4 of 4 Attachment A Excerpt from COL Appendix 0 Table 2.1.2-1 Equipment Name

• Tag No.* Active Function

• First-stage ADS Motor-operated RCS-PL-V001A Transfer Open Valve(MOV)

First-stage ADS Transfer Open RCS-PL-V001B MOV Second-stage ADS Transfer Open RCS-PL-V002A MOV Second-stage ADS Transfer Open RCS-PL-V002B MOV Third-stage ADS Transfer Open RCS-PL-V003A MOV Third-stage ADS Transfer Open RCS-PL-V003B MOV First-stage ADS Transfer Open RCS-PL-V011A Isolation MOV First-stage ADS Transfer Open RCS-PL-V011B Isolation MOV Second-stage ADS Transfer Open RCS-PL-V012A Isolation MOV Second-stage ADS Transfer Open RCS-PL-V012B Isolation MOV Third-stage ADS Transfer Open RCS-PL-V013A Isolation MOV Third-stage ADS Transfer Open RCS-PL-V013B Isolation MOV